The phrase "doest thing" is not a commonly used term in modern English. However, if we were to think of possible antonyms for the word "do", the options could be extensive. Antonyms could include not doing, neglecting, bypassing, omitting, disregarding, ignoring, or avoiding. Each of these antonyms indicates a lack of action or a conscious decision to refrain from doing something. The opposite of doing something is often not doing it or not taking any action, while the act of not doing something can represent a choice or an oversight. Hence, it's essential to consider the context in which "doest thing" is being used to identify relevant antonyms.